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Intravascular stent

A vascular stent and coating technology, applied in the direction of blood vessels, stents, human tubular structures, etc., can solve the problems of high price, thrombosis of bare metal stents, etc., and achieve low cost, facilitate cell ingrowth, and reduce thrombosis. effect

Inactive Publication Date: 2011-09-28
王嘉贤 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It can be seen from the above that in order to solve the hyperplasia and prevent the formation of thrombus, people use drug stents, but there are many problems with drug stents. Neither bare metal stents nor drug stents can solve the problems of postoperative restenosis and thrombosis well.
In addition, imported drug stents are expensive

Method used

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Embodiment Construction

[0021] specific implementation plan

[0022] Now in conjunction with accompanying drawing, the present invention will be further described:

[0023] A vascular stent coated with an antithrombotic and antiproliferative solid film or coating on the surface, such as image 3 and Figure 4 As shown, it consists of a stent 1 and a solid film or coating 2 that is not absorbed by the human body and is covered on all surfaces. The stent 1 is made of common alloy materials or memory alloys. The film or coating The material of layer 2 is preferably polytetrafluoroethylene (PTFE), expanded polytetrafluoroethylene (e-PTFE) or polyurethane. The two are sintered together, and can also be bonded together with medical glue, or a thermal spraying process can be used, or stent 1 is immersed in polytetrafluoroethylene after melting polytetrafluoroethylene or expanded polytetrafluoroethylene or polyurethane. Molded in vinyl fluoride, expanded polytetrafluoroethylene or polyurethane liquid. Bo...

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Abstract

The invention relates to an intravascular stent. The intravascular stent is of a tubular structure, wherein the tube wall is provided with a nick parallel to the axial direction. The intravascular stent is made of common alloy materials or memory alloy materials; and all the surfaces of the intravascular stent are wrapped by solid films or coatings, and the films or coatings are polytetrafluoroethylene, expanded polytetrafluoroethylene or polyurethane. The intravascular stent inhibits the aggregation of thrombocytes so as to avoid thrombosis as far as possible, can promote the ingrowth of cells and form a vascular endothelial layer, has the advantages of excellent biocompatibility, no reject reaction, hyperplasia reduction, no foreign body sensation, no sensitization and wide application range, overcomes some defects in the prior art, saves precious metals and reduces the cost of the product.

Description

technical field [0001] The invention relates to the field of medical vascular stents, in particular to a human body vascular stent for interventional treatment. Background technique [0002] In medicine, interventional therapy is more commonly used after human arterial stenosis or occlusion. Because it is minimally invasive, simple, safe, and effective, it has been widely adopted by people. "The postoperative restenosis of drug-eluting stents (DES) can reach 5%-8% of the number of people operated on, which is significantly lower than that of bare metal stents (BMS) (such as figure 1 , figure 2 30% of shown). One of the reasons why DES leads to the increase of late thrombus may be that the polymer carrier (polymer) on the surface of the drug stent inhibits the repair and healing process of endothelial cells. "[1] "There is significant and persistent coronary endothelial dysfunction after drug-eluting stent (DES) implantation. Six months after DES implantation, there wer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24A61F2/82A61F2/06A61F2/958
Inventor 王嘉贤刘俊
Owner 王嘉贤
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